THE BIOLOGY OF CANADIAN WEEDS.: 50. Hypochoeris radicata L.

1981 ◽  
Vol 61 (2) ◽  
pp. 365-381 ◽  
Author(s):  
LONNIE W. AARSSEN
Keyword(s):  
British Columbia ◽  
Taraxacum Officinale ◽  
Vancouver Island ◽  
Biological Data ◽  
The West ◽  
Close Resemblance ◽  
Queen Charlotte Islands ◽  
Bright Yellow ◽  
Wide Range

This paper provides a summary of biological data on Hypochoeris radicata L. (spotted cat’s-ear). This weed is naturalized in Canada on both the west and east coasts but is common only on Vancouver Island, the Queen Charlotte Islands, and the adjacent mainland of British Columbia. It is adapted to a wide range of habitats such as lawns, fields and along roadsides. The species is commonly mistaken for dandelion (Taraxacum officinale Weber), fall hawkbit (Leontodon autumnalis L.) or Hypochoeris glabra L. due to the close resemblance of their bright yellow flowers. This last species is the only other member of the genus occurring in Canada and it hybridizes readily in nature with H. radicata. Several herbicides can be used to control H. radicata.

scholarly journals Seasonal Variation of Temperature and Salinity of Surface Waters of the British Columbia Coast

1953 ◽  
Vol 10 (3) ◽  
pp. 125-145 ◽  
Author(s):  
G. L. Pickard ◽  
D. C. McLeod
Keyword(s):  
British Columbia ◽  
West Coast ◽  
Sea Water ◽  
Deep Ocean ◽  
Vancouver Island ◽  
Early Summer ◽  
The West ◽  
Queen Charlotte Islands ◽  
Land Drainage ◽  
Run Off

Grand monthly means of daily observations of surface sea-water temperature and salinity from twelve light stations along the British Columbia coast during the 13 years 1935 to 1948 have been analysed. In general the temperatures reach a minimum of 45°F. ± 1° (7.2 °C. ± 0.5°) in January and February. The maximum varies from 50° to 64°F. (10° to 18 °C.) in August. The warmest waters occur in bays protected from wind action, and the coldest waters occur in regions of turbulent mixing due to wind or strong currents. The salinity along the mainland coast is a minimum in early summer, associated with the maximum run-off from melting snow. Along the west coast of Vancouver Island the minimum occurs in mid-winter, associated with maximum precipitation which is not stored as snow in this region. At the southern and northern tip of the Queen Charlotte Islands there is little or no variation of salinity because there is no land drainage of consequence in the vicinity.In passes between Georgia Strait and the sea where the waters are mixed to homogeneity by strong tidal currents the annual variation of temperature and salinity is reduced, and in some cases entirely suppressed.On the west coast of Vancouver Island it is shown that the annual cycle is affected by the dominant winds and upwelling of deep ocean waters.

The nootka and sandwich vocabularies in the relación de la entrada de san lorenzo de nutka (1789)

2013 ◽  
Vol 66 (3) ◽  
Author(s):  
Rebeca Fernández Rodríguez
Keyword(s):  
British Columbia ◽  
West Coast ◽  
Vancouver Island ◽  
The West ◽  
San Lorenzo

AbstractNootka is an historical fur-trading centre in Yuquot, on the west coast of Vancouver Island, British Columbia, Canada. In 1788, the Spanish king Charles III sent an expedition to Nootka commanded by Ignacio Arteaga (1731-1783). A year later, Spain established a military post, San Lorenzo de Nutka, at Yuquot in 1789 which existed until 1795. The missionaries who arrived with the sailors were urged to learn the vernacular languages in order to evangelize. In chapter 5 of the

A Model of Seawater Structure Near the West Coast of Vancouver Island, British Columbia

1963 ◽  
Vol 20 (4) ◽  
pp. 939-967 ◽  
Author(s):  
Robert K. Lane
Keyword(s):  
British Columbia ◽  
West Coast ◽  
Large Scale ◽  
Coastal Region ◽  
Vancouver Island ◽  
Structural Elements ◽  
The West ◽  
Characteristic Structure ◽  
Oceanographic Data ◽  
Vertical Sections

Oceanographic data collected in a line of stations extending seaward of the west coast of Vancouver Island, British Columbia, were reviewed and analyzed. On the basis of these data and the large-scale meteorological processes of wind, insolation, and precipitation, the characteristic structure of temperature and salinity in the coastal region was denned in five temporal stages throughout the year. These stages are presented as vertical sections along the line with characteristic ranges of values to be found in each of the structural elements.

RECORDS OF SOME SPECIES OF POLYCHAETA NEW TO BRITISH COLUMBIA AND OF EXTENSIONS IN DISTRIBUTION OF SOME OTHERS

1966 ◽  
Vol 44 (5) ◽  
pp. 839-849 ◽  
Author(s):  
C. Berkeley
Keyword(s):  
British Columbia ◽  
North America ◽  
West Coast ◽  
Vancouver Island ◽  
The Other ◽  
The West ◽  
New Subspecies ◽  
Northeast Pacific ◽  
Considerable Depth ◽  
Geographical Locations

Twenty-five species of Polychaeta recently collected off the coast of British Columbia are discussed. Most were taken in waters of considerable depth off the west coast of Vancouver Island. Sixteen are new to British Columbia. Most of these are known from farther south on the west coast of North America, but some from much shallower depths than those from which they are now recorded; two of them are new to the northeast Pacific; one is a new subspecies. The other nine have been previously known from British Columbia, but they are now recorded from much greater depths than hitherto, or in new geographical locations.

Lampetra macrostoma, a New Species of Freshwater Parasitic Lamprey from the West Coast of Canada

1982 ◽  
Vol 39 (5) ◽  
pp. 736-747 ◽  
Author(s):  
Richard J. Beamish
Keyword(s):  
British Columbia ◽  
New Species ◽  
West Coast ◽  
Related Species ◽  
Salt Water ◽  
Vancouver Island ◽  
The West ◽  
Large Disc ◽  
Large Numbers ◽  
A New Species

Lampetra macrostoma n.sp., a freshwater parasitic lamprey, is distinguished from related species L. tridentata, L. lethophaga, L. folletti, L. minima, and L. similis by its parasitic habit and very large disc. Other characters distinguishing the species from L. tridentata are its longer prebranchial length, large eye, weakly pigmented velar tentacles, and its ability to remain in freshwater. The recently metamorphosed form readily survives in freshwater and probably is non-anadromous even though it can survive in salt water. The new species has been discovered in two lakes on Vancouver Island, British Columbia, Canada, where it attacks large numbers of resident salmonids. Because of its ability to survive and feed in freshwater, it poses a definite threat to freshwater fishes.Key words: lamprey, new species, non-anadromous lamprey, salmonid parasitism

A Statistical Examination of Anisakis Larvae (Nematoda) in Herring (Clupea pallasi) of the British Columbia Coast

1955 ◽  
Vol 12 (4) ◽  
pp. 571-592 ◽  
Author(s):  
Yvonne M. M. Bishop ◽  
Leo Margolis
Keyword(s):  
British Columbia ◽  
West Coast ◽  
Maximum Level ◽  
Vancouver Island ◽  
First Year ◽  
Intensity Of Infection ◽  
The West ◽  
Strait Of Georgia ◽  
Clupea Pallasi ◽  
First Year Of Life

The presence of larval Anisakis in British Columbia herring was examined during the winter fisheries of 1950–51 and 1951–52. In the commercial catches in the Strait of Georgia the incidence was found to be between 80 and 90%. In Hecate Strait, on the west coast of Vancouver Island and in the mainland coastal area of Queen Charlotte Sound it was between 90 and 100%. The intensity of infection varied greatly in different fishing areas (i.e. in different herring populations). Generally, the maximum level of infection occurred in the Queen Charlotte Sound coastal regions, and decreased both north and south of this area. Fish on the west coast of Vancouver Island were more heavily infected than those on the east coast (Strait of Georgia). The level of infection increased with age, I-year fish (i.e. fish in their first year of life) being uninfected. The intensity of infection remained constant throughout the winter for any particular age and area and was the same for both sexes. In most areas the level of infection was a little lower in 1951–52 than in 1950–51.

Accretion-related metamorphism of the Metchosin Igneous Complex, southern Vancouver Island, British Columbia

2005 ◽  
Vol 42 (8) ◽  
pp. 1467-1479 ◽  
Author(s):  
Sean Timpa ◽  
Kathryn M Gillis ◽  
Dante Canil
Keyword(s):  
British Columbia ◽  
Regional Metamorphism ◽  
Vancouver Island ◽  
Island Arcs ◽  
The West ◽  
Volcanic Stratigraphy ◽  
Igneous Complex ◽  
Orographic Effects ◽  
Metamorphic History ◽  
Metamorphic Facies

The metamorphic history of the volcanic sequence of the Metchosin Igneous Complex (MIC), an Eocene ophiolite exposed on southern Vancouver Island, British Columbia, Canada, was studied to examine the roles of seafloor and accretion-related processes. Metamorphic facies in the volcanics vary from prehnite–actinolite assemblages in the east to greenschist and amphibolite assemblages in the west. In the east, metamorphism is typified by chlorite ± prehnite ± epidote ± actinolite assemblages that fill vesicles and replace interstitial material; plagioclase is variably albitized, and clinopyroxene is relatively fresh. In the west, the common groundmass assemblage is amphibole + epidote ± chlorite. These assemblages and chlorite geothermometry show a regional east–west gradient of ∼5–10 °C/km that is oblique to the volcanic stratigraphy. The regional metamorphic facies distribution for the MIC volcanics is not consistent with seafloor hydrothermal metamorphism documented for ocean crust from mid-ocean ridges, ocean islands, or island arcs. We speculate that underthrusting of the MIC beneath the Pacific Rim Terrane led to the regional metamorphism of the MIC, and that the change in metamorphic grade from east to west results from regional tilting of the complex, perhaps by orographic effects, during or after accretion.

Geographic and sexual variation in the skull of Pacific coast marten (Martes americana)

1989 ◽  
Vol 67 (6) ◽  
pp. 1386-1393 ◽  
Author(s):  
Guillermo R. Giannico ◽  
David W. Nagorsen
Keyword(s):  
British Columbia ◽  
Sexual Dimorphism ◽  
Pacific Coast ◽  
Multivariate Analyses ◽  
Vancouver Island ◽  
Martes Americana ◽  
The Third ◽  
Queen Charlotte Islands ◽  
Sexual Variation ◽  
Cranial Measurements

From multivariate analyses of 25 cranial measurements, we assessed geographic and sexual variation in three island and two mainland samples of Pacific coast marten (Marten americana) from the caurina subspecies group. Three morphological groups were evident: the first from Queen Charlotte Islands, the second from Alexander Archipelago and Alaska Panhandle, and the third from Vancouver Island and the southern British Columbia coast. We concluded that the subspecies M. a. nesophila should be restricted to the Queen Charlotte Islands; Vancouver Island and southern British Columbia coastal marten are aligned with M. a. caurina. Alaskan marten showed some affinities with the americana subspecies group. The strong differentiation of M. a. nesophila is concordant with the isolation and unique selection regime of the Queen Charlotte Islands. Sexual dimorphism was most pronounced in island samples; possible explanations for this trend are discussed.

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